The reason they were used was because:
1) they are capable of full power forward or reverse. So one engine doesn't need to be counter-rotated.
2) they have a built in 1.5:1 gear reduction.
3) they have a drop center, dow angle output which lines up with the drive.
A crash box has none of this, so give up on that idea.
Check with Huber, Bam, etc. they may have a solution for you.
Gary

BAM was recommending a ZF-80. Problem is fitment. The drive coupler is already probably as short as can be and the engines are pretty close to the front right now. I don't know how close because they aren't in the boat now.

Ive got the number for bam, anyone have contact info huber. Didn't find it on a search.

It looks like the dropdown from input to output shaft is 5.65 with the output being at a 10 degree angle. It looks like the distance from the front of the tranny(not including bellhousing) to the out put shaft is 9.1 inches.

I would talk with Rik at Arneson

Huber Marine's Phone # 225-927-6895
Great Choice.



SCS shiftable crash box
About $ 9g's per engine, it think that answers your question
SCS Shiftable Crash box link

Good luck
Cougarman

Don't know where Huber is located, but you can't get through due to the hurricane.

Arneson's a good choice. I'm sure they've put together lots of trannys for inline ASDs. Rik is on the board.
Again a crashbox wont work due to the issues above.
You may also want to check with BAM, Huber, etc to see if they can upgrade yours, or the 5000 series BW, Hurth, or can set up a drop center, gear reduction 72C tranny for that much HP.

Baton Rouge, LA


Spoke with them a few days ago they are open and up and running so keep trying.

Cougarman

Seems like the biggest problem with using a different tranny is getting the necessary drop. There is about a 5.65 inch drop from input shaft to output shaft, then the output shaft itself is at a 10 degree down angle. The Twin disc dealer is still looking into the possibility of using another one of their trannys. I did get a hold of huber, but at a different number. Will talk with them again later. The Arneson conversion is just too expensive for me.